Investigation of T-Wave Propagation in the Offshore Area East of Taiwan from Early Analog Seismic Network Observations

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题名:	Investigation of T-Wave Propagation in the Offshore Area East of Taiwan from Early Analog Seismic Network Observations
作者:	Huang,BS;Chen,PF;Huang,YL;Huang,WG;Liu,CC
贡献者:	地球物理研究所
关键词:	COAST;OCEAN
日期:	2011
上传时间:	2012-03-27 17:37:04 (UTC+8)
出版者:	國立中央大學
摘要:	Extant paper records of the early analog seismic network of Taiwan represent a large resource for earthquake studies in several disciplines. In this study, we report on T waves generated from offshore earthquakes, based on analog observations. The T phases were identified from their stable apparent velocity of about 1.5 km s(-1) and other observations using data recorded by stations in eastern Taiwan and on two nearby islands. The observed T phases are recorded for the first time from Taiwan, and in particular are observed by the network in the distal range of local earthquakes. Most of the T waves are observed at island stations at epicentral distances greater than 100 km. For earthquakes that occurred a great distance east of Taiwan, the T phases are always the most dominant phases observed at island stations east of Taiwan, and are also seen at some inland stations with smaller amplitudes. No T phases from inland events were observed by stations on Taiwan or on nearby islands. The observations indicate that the amplitude of the T phase is highly attenuated on its land path and that the propagation direction of the T phase is affected by water depth.
關聯:	TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
显示于类别:	[地球物理研究所] 期刊論文

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